<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>select标签</title>
    <style>
        body{
            font:120% 微软雅黑;
        }
        select option{
            font:80% 微软雅黑;
            color:red;
        }
    </style>
</head>
<body>
   <form action="">
       可选地址：
       <select name="上海">
           <optgroup label="team1">
               <option>黄浦区</option>
               <option>虹口区</option>
               <option>静安区</option>
           </optgroup>
           <optgroup label="team2">
               <option>浦东新区</option>
               <option>宝山区</option>
               <option>松江区</option>
           </optgroup>
       </select>
   </form>
</body>
</html>